In a first for the “Star Trek” franchise, characters who are gender non-binary and transgender will appear on the third season of “Star Trek: Discovery,” CBS All Access announced on Wednesday.Ian Alexander (“The OA”) will play Gray, a trans man who has spent his life planning to be a Trill host for a symbiotic alien species that lives in different hosts over its lifetime.And newcomer Blu del Barrio will play Adira, a non-binary character who bonds with Lt.